package com.vip.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.vip.eduservice.entity.EduSubject;
import com.vip.eduservice.entity.excel.SubjectData;
import com.vip.eduservice.service.EduSubjectService;


public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    // 因为EduSubjectService 不能交给spring进行管理，需要自己new，不能注入其他对象
    public EduSubjectService subjectService;

    public SubjectExcelListener() {}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData , AnalysisContext analysisContext) {
        if (subjectService == null) {
            return;
        }
        // 一行一行读取
        // 判断一级分类是否已经存在
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null) {
            existOneSubject= new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        String pid = existOneSubject.getId();
        // 判断二级分类
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);

        if (existTwoSubject == null) {

            existTwoSubject= new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }


    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }

    // 判断一级分类不能重复添加
    private EduSubject existOneSubject(EduSubjectService subjectService, String name) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", "0");
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    // 判断二级分类不能重复添加
    private EduSubject existTwoSubject(EduSubjectService subjectService, String name, String pid) {
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title", name);
        wrapper.eq("parent_id", pid);

        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }
}
